Eighth Grade, Chemistry Projects, Lessons, Activities (Page 6)

Build a Bathtub Toy Raft Powered by Surface Tension

STEM Activity

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Have you ever wondered why a water strider can walk on water? Or how detergent can clean your dishes? If you look around you carefully, you can find dozens of similarly interesting phenomena that are all linked to the surface tension of water. In this science activity, you will make a little toy raft that is actually powered by surface tension, and use your vessel to investigate how surface tension works! Read more

Can You Change the Rate of a Chemical Reaction by Changing the Particle Size of the Reactants?

Science Fair Project Idea

Scientific Method

The ingredients in Alka-Seltzer® tablets undergo a chemical reaction that produces carbon dioxide gas as soon as the tablets hit water. Do you think you can cause the tablets to produce gas faster by breaking them into smaller pieces before dropping them in water? Find out for yourself with this project. Read more

Candy Lightning: A Flashy Activity

STEM Activity

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Did you know that instances of miniature lightning can occur in your mouth when you bite on a hard candy? Would it not be fascinating if you could observe these light flashes? Life Savers® Wint O Green® mints might just be the tool we need to observe this science! Crush them, observe, and detect what makes the flashes visible. How many sparks can you see? Read more

Diaper Science: How Hydrogels Absorb Water

Science Fair Project Idea

Scientific Method

Many disposable diapers contain a polymer, called sodium acrylate, which is useful for absorbing water. Do background research to learn about sodium acrylate, and how it reacts with water. Make sure that you understand the terms hydrophilic, polarity, hydrogel and hydrogen bonding. Cut out the middle, padded section of a disposable diaper. Cut this into equally-sized square pieces, approximately 10-12 cm on a side. Remove some of the stuffing material so that you can staple the open… Read more

Do Oranges Lose or Gain Vitamin C After Being Picked?

Science Fair Project Idea

Scientific Method

Are oranges highest in vitamin C when they are fresh from the tree (or, in a pinch, the grocery shelf)? Does the amount of vitamin C in an orange change over time, after it has been picked? In this science project, you will find answers to these questions by measuring the amount of vitamin C in a solution using an iodine titration method. Read more

Dye Eggs Using Silk Ties for Egg-cellent Colors

STEM Activity

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Have you ever dyed eggs? Turning eggshells from white into different, dazzling colors can be a lot of fun! People often do this using dye tablets to make different colors in a liquid bath. They then dip the egg into the liquid and wait till it turns the desired color. Eggs can be dyed in many other ways, and one neat method uses silk ties. Sounds strange to use clothing to dye eggs, right? But it actually works really well! In this activity, you will dye eggs with silk ties and… Read more

Explore Enzyme Activity with Toothpicks

STEM Activity

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Do you know what enzymes are? They are like little machines that carry out many different chemical reactions that are essential for nature and our bodies. For example, they help break down the food we eat, or help make yogurt and cheese! In this activity, you will simulate an enzymatic reaction and explore what factors affect the activity of an enzyme. You only need a few simple items, including your hands, lots of toothpicks, and a timer. Read more

Explore the Effects of pH on Lead Testing.

Science Fair Project Idea

Scientific Method

Lead is a very hazardous element. Even very small amounts can cause health problems, especially in babies and young children. One way to determine if a household item, such as a toy or a piece of jewelry, contains lead is to soak the item in a solution, and then test the solution for lead that might have leached out of the item. The goal of this chemistry science fair project is to determine how varying the pH of the test solution affects its ability to dissolve lead, which is a critical step… Read more

From Black to Clear with the Magic of Photochemistry

Science Fair Project Idea

Scientific Method

The rates of some chemical reactions can actually be increased by adding light. Light sometimes interacts with one or more of the chemicals and provides an "energy boost" that dramatically speeds up a normally slow reaction. In this photochemistry science project, you will experiment with the effect of light on a chemical reaction. The reaction converts iodine, which forms a dark-orange solution, to iodide, which is colorless! Read more

How Fast Does an Alka-Seltzer® Tablet Make Gas?

Science Fair Project Idea

Scientific Method

This is a straightforward, fun project to measure the rate of the chemical reaction that occurs when Alka-Seltzer® tablets are plopped into water. You will track the volume of carbon dioxide gas produced at regular intervals after the reaction begins. How does changing the temperature of the water affect the production of gas? Read more

Eighth Grade, Chemistry Projects, Lessons, Activities (76 results)

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